Carpet fibers and fuzz from new or old carpet just rub your hand on it or use a butterknife. Or go to a carpet store and look at the scraps easier to get the fuzz from new carpet scraps
Copper wire from old electric cords
Easter grass
Balloon holders the foil ones
marking tape for hunting usualy just orange
garbage bags uncented
beads from kids knecklaces
the rubber twist from a sinker for eyes
rubber cleaning gloves for scuds
sock fuzz wash first
round foam weather stripping for poppers
stirring straws
paint rollers for dubbing
ROAD KILL
Well thats some of the stuff I can think of now that wasnt already posted I've used hope it helps someone